Spinous process clamp and fixation device

摘要

A modular system for fixation of a spinous process includes at least one pair of blocks shaped so as to engage a particular segment of the spinous process and arranged on opposing sides of the spinous process. Each block has a surface facing the portion of the spinous process to be engaged, the surface having an array of sharp spikes to penetrate the spinous process when so engaged. Two rods arranged parallel to the spinous process are provided to connect the at least one pair of blocks and therefore stabilize multiple segments of the spinous process. Each block includes an aperture within a central portion of the block and shaped so as to slidably receive one of the rods. Set screws are provided so as to securely position the block along the length of the rod.

主权项

1. A spinous process clamp apparatus configured for attachment to first and second longitudinal rods positioned on opposite sides of a spinous process member, the apparatus comprising:
a primary block including a primary clamp plate and a primary rod channel, the primary rod channel shaped for receiving the first longitudinal rod against the primary clamp plate; a secondary block opposite the primary block, the secondary block including a secondary clamp plate and a secondary rod channel, the secondary rod channel shaped for receiving the second longitudinal rod against the secondary clamp plate; a clamp post protruding from the primary block, the secondary block movable along the clamp post; a primary rod fastener disposed on the primary block configured to secure the primary block at a desired location on the first longitudinal rod; a secondary rod fastener disposed on the secondary block configured to secure the secondary block at a desired location on the second longitudinal rod; a clamp post socket defined on the secondary block, wherein the clamp post extends from the primary block toward the secondary block and is received in the clamp post socket; a clamp post fastener disposed on the secondary block, the clamp post fastener configured to secure the secondary block to the clamp post; and wherein the primary and secondary clamp plates are configured to apply compressive forces against opposite sides of the spinous process member when the spinous process member is positioned between the primary and secondary clamp plates, wherein the primary rod channel is defined in a side of the primary clamp plate facing away from the secondary block, the primary rod channel extending entirely through the primary block along a longitudinal axis of the primary block, and the secondary rod channel is defined in a side of the secondary clamp plate facing away from the primary block, the secondary rod channel extending entirely through the secondary block along a longitudinal axis of the secondary block.